By the way, to have your arduino recognized as a monome by monomeserial, you have to change the FTDI chip ID.
To do that, you have to install Mprog and the D2XX drivers from FTDI (your arduino will still work with the arduino IDE with this drivers)
MProg 3.0 > http://www.ftdichip.com/Resources/Utilities.htm
D2XX Drivers > http://www.ftdichip.com/Drivers/D2XX.htm
1/ Install both, then run Mprog
2/ Launch Mprog, then click on Device / Scan. You should see something like this appearing in the box down.
Number Of Blank Devices = 0
Number Of Programmed Devices = 1
3/ Click on Tools > Read and Parse. This will fill the boxes.
4/ Check the "use fixed serial number" box and change the value below.
To have your board recognized as a monome by monome serial, you have to enter something like
Choose whatever you want, I'm not sure what is different between the various IDs, for the moment I'm using m40h-001.
There is 2 protocols described on the monome site, and the 64/128/256 seems to be more complete (15 message IDs, 9 for the 40h protocol), so maybe you'd better use m256-xxx ^^
5/ Click on File > save as
6/ Once saved, click on the flash icon (Program all existing devices, Ctrl+P).
7/ Unplug / plug back your board from the usb port.
7/ Run monomeserial, you should see something appear on the devices list.